Year Introduced: 1930s
Sport: Baseball, Football, Track and Field, Basketball, Hockey, Cycling

While the purist inside us may not like to admit it, steroids have had an undeniable impact on every major, competitive sport on the planet. The list of offenders goes on and on, starting with Ben Johnson, Marion Jones, Lance Armstrong and nearly every single baseball player who suited up in the '90s (shouts to Ken Griffey Jr. for always staying clean, though). Unfortunately, the techniques used to mask doping have also become equally advanced, so it appears that chemical advantages have just become a part of the game. Like it or not, 'roids are here to stay.